38 results about "Exposure measurement" patented technology

Systems and methods are provided for gathering audience measurement data relating to receipt of and / or exposure to audio data by an audience member. Audio data is monitored to detect a monitoring code. Based on detection of the monitoring code, a signature characterizing the audio data is extracted.

Systems, methods and devices for gathering data concerning exposure of predetermined survey participants to billboards are provided. A portable transmitter is arranged to transmit a signal containing survey participant data, and a receiver located proximately to the billboard serves to receive the signal transmitted by the transmitter.

A method for sensing a level of ionizing radiation directed from a radiation source through a subject and toward a digital radiography detector, executed at least in part by a logic processor, obtains image data that relates the position of the subject to the digital radiography detector and assigns one or more radiant-energy sensing elements of the digital radiography detector as one or more exposure control sensing elements. The one or more exposure control sensing elements are sampled one or more times during exposure to measure the exposure directed to the subject. A signal is provided to terminate exposure according to exposure measurements obtained from the one or more exposure control sensing elements within the digital radiography detector.

A Raman spectrum is measured inside animal tissue, such us human skin tissue, at a selected depth from a surface the tissue. A pH value is computed using a function that assigns a pH value as a function of the measured Raman spectrum. The computation may involve computing a number representing a ratio of concentrations of a protonated and a deprotonated version of a chemical substance from the Raman spectrum and generating pH information on the basis of said number. The chemical substance is for example a form of Urocanic acid (UCA). UV exposure is measured from the weight of the spectrum of cis-UCA.

The invention discloses an exposure sensor based on memristors connected in reverse series. The exposure sensor comprises a first power supply V1, a second power supply V2, a switch K, a photoelectric module, a current-limiting module, an memristor module, a difference-acquiring module, an amplifying module, and an increasing module. The first power supply V1 or the second power supply V2 forms a circuit successively with the switch K, the photoelectric module, the current-limiting module and the memristor module. The memristor module includes memristors Mz1, Mz2, Mj1 and Mj2. The Mj1 and the Mj2 are completely the same. The Mz1 and the Mj1 are connected in series. The Mz2 and the Mj2 are connected in series. A series branch formed by the Mz1 and the Mj1 is connected in parallel with a series branch formed by the Mz2 and the Mj2. The difference-acquiring module is connected with the memristor module. The amplifying module is connected to the difference-acquiring module. The increasing module is connected with the amplifying module. The exposure sensor is large in exposure measurement range, high in sensitivity, suitable for the measurement of large exposure and long exposure, and is simple in circuit, avoids an influence of a memristor resistance value change on the loop current and the exposure measurement of the sensor, and is low in measurement error and easy to use.

An exposure measurement apparatus is configured by including a size measurer measuring respective sizes of at least a pair of transferred patterns having mutually different optimal focus positions out of a plurality of transferred patterns formed by being transferred onto a transfer object, a difference value calculator obtaining a difference value between the size of one transferred pattern and the size of the other transferred pattern, a focus variation amount calculator calculating a focus variation amount of the transfer object using the difference value, and an exposure variation amount calculator calculating an exposure error amount of a wafer.

A digital X-ray system for capturing high quality images by maximizing the collection of emitted light from an intensifying screen in response to X-ray impact. The digital X-ray system includes a housing having a fluorescent intensifying screen for receiving emitted X-rays, two reflectors for maximizing light collection and optimizing the light path from the intensifying screen, and a lens assembly. A CCD chip receives the light from the lens assembly, to provide a digital image for immediate on-board processing or post- processing by a computer. The housing is compact, and can be used as a direct replacement for traditional film cartridges without major modifications to the system. The lens assembly includes freeform matched lenses to remove optical distortions, and the housing includes a light sensor for providing exposure measurement and feedback. The system is designed to be quasi-monochromatic to maintain consistent image quality over the entire area of the intensifying screen.

This invention provides one automatic exposure measurement method to determine exposure value with host image, which comprises the following steps: host testing step to test image host position by use of focus value; exposure value computing step to compute image exposure value by use of automatic exposure computation function.

The invention discloses an equipment layout regulating method on the basis of exposure measurement on microwave frequency band radiation. According to the method, by measuring microwave frequency band radiation intensity of airborne equipment in different regions of a helicopter cabin body, combining a military standard limit and adopting a weighting matrix strategy, calculation on the electromagnetic compatibility balance degree of the complete machine microwave frequency band radiation of a helicopter system is completed and the problems that conventionally, an electromagnetic compatibility balanced state of the equipment radiation in the microwave frequency band of the system is difficult to well track and monitor and improvement potential of the electromagnetic compatibility of the system cannot be judged are solved. By considering the radiation characteristics of the complete machine microwave frequency band of the helicopter system, the electromagnetic compatibility balanced state of the complete machine microwave frequency band of the helicopter system is evaluated, so that pertinence and effectiveness of quantitative evaluation on the electromagnetic compatibility of the microwave frequency range are improved.

The invention discloses a visual measurement device for underground water level under negative pressure conditions, which includes a permeable pipe, a floating block, a pulley, a high-definition camera with a light source, a wire, a fixed wire interface, an indicator needle, a top cover, a bottom cover, and external display equipment. , Geotechnical filter cloth. The invention also discloses the measurement method of the device. The floating block drives the high-definition camera with the light source to change freely up and down with the floating of the groundwater level. When measuring each time, the external display equipment located outside the permeable pipe passes through the wire and the high-definition camera. The camera is connected to shoot the scale position pointed by the indicator needle in the pipe, so as to obtain the groundwater level under the negative pressure condition. The invention can accurately measure the real groundwater level under the negative pressure condition, avoids the error of traditional open measurement, and has simple structure, easy manufacture, low cost, convenient use and wide application prospect.

A mobile device (100) comprising a processor (338), a camera module (360), and a flash (366) configured to generate at least one of a reduced pre-flash, a standard pre-flash and a flash. The processor (338), in response to receiving an image capture request (202), is configured to receive a brightness value (204) and determine a flash status (206) based on a flash setting with the flash status being one of an off mode, on mode, and auto mode. In the event the flash status is one of the on mode and auto mode, determine whether there is sufficient light to capture an image based at least in part on a comparison of the brightness value and a flash threshold (208). In the event the brightness value is greater than the flash threshold, cause the flash to generate a shortened pre-flash (214) and obtain only a white balance measurement and an auto-exposure measurement during the shortened pre-flash.